1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include <sys/socket.h>
31 #include <sys/prctl.h>
32 #include <linux/sched.h>
33 #include <sys/types.h>
37 #include <sys/mount.h>
46 #include "securebits.h"
48 #include "namespace.h"
50 /* This assumes there is a 'tty' group */
53 static int shift_fds(int fds
[], unsigned n_fds
) {
54 int start
, restart_from
;
59 /* Modifies the fds array! (sorts it) */
69 for (i
= start
; i
< (int) n_fds
; i
++) {
72 /* Already at right index? */
76 if ((nfd
= fcntl(fds
[i
], F_DUPFD
, i
+3)) < 0)
79 close_nointr_nofail(fds
[i
]);
82 /* Hmm, the fd we wanted isn't free? Then
83 * let's remember that and try again from here*/
84 if (nfd
!= i
+3 && restart_from
< 0)
97 static int flags_fds(const int fds
[], unsigned n_fds
, bool nonblock
) {
106 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
108 for (i
= 0; i
< n_fds
; i
++) {
110 if ((r
= fd_nonblock(fds
[i
], nonblock
)) < 0)
113 /* We unconditionally drop FD_CLOEXEC from the fds,
114 * since after all we want to pass these fds to our
117 if ((r
= fd_cloexec(fds
[i
], false)) < 0)
124 static const char *tty_path(const ExecContext
*context
) {
127 if (context
->tty_path
)
128 return context
->tty_path
;
130 return "/dev/console";
133 static int open_null_as(int flags
, int nfd
) {
138 if ((fd
= open("/dev/null", flags
|O_NOCTTY
)) < 0)
142 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
143 close_nointr_nofail(fd
);
150 static int connect_logger_as(const ExecContext
*context
, ExecOutput output
, const char *ident
, int nfd
) {
154 struct sockaddr_un un
;
158 assert(output
< _EXEC_OUTPUT_MAX
);
162 if ((fd
= socket(AF_UNIX
, SOCK_STREAM
, 0)) < 0)
166 sa
.sa
.sa_family
= AF_UNIX
;
167 strncpy(sa
.un
.sun_path
+1, LOGGER_SOCKET
, sizeof(sa
.un
.sun_path
)-1);
169 if (connect(fd
, &sa
.sa
, sizeof(sa
)) < 0) {
170 close_nointr_nofail(fd
);
174 if (shutdown(fd
, SHUT_RD
) < 0) {
175 close_nointr_nofail(fd
);
179 /* We speak a very simple protocol between log server
180 * and client: one line for the log destination (kmsg
181 * or syslog), followed by the priority field,
182 * followed by the process name. Since we replaced
183 * stdin/stderr we simple use stdio to write to
184 * it. Note that we use stderr, to minimize buffer
185 * flushing issues. */
191 output
== EXEC_OUTPUT_KERNEL
? "kmsg" : "syslog",
192 context
->syslog_priority
,
193 context
->syslog_identifier
? context
->syslog_identifier
: ident
);
196 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
197 close_nointr_nofail(fd
);
203 static int open_terminal_as(const char *path
, mode_t mode
, int nfd
) {
209 if ((fd
= open_terminal(path
, mode
| O_NOCTTY
)) < 0)
213 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
214 close_nointr_nofail(fd
);
221 static bool is_terminal_input(ExecInput i
) {
223 i
== EXEC_INPUT_TTY
||
224 i
== EXEC_INPUT_TTY_FORCE
||
225 i
== EXEC_INPUT_TTY_FAIL
;
228 static int fixup_input(const ExecContext
*context
, int socket_fd
) {
231 if (socket_fd
< 0 && context
->std_input
== EXEC_INPUT_SOCKET
)
232 return EXEC_INPUT_NULL
;
234 return context
->std_input
;
237 static int fixup_output(const ExecContext
*context
, int socket_fd
) {
240 if (socket_fd
< 0 && context
->std_output
== EXEC_OUTPUT_SOCKET
)
241 return EXEC_OUTPUT_INHERIT
;
243 return context
->std_output
;
246 static int fixup_error(const ExecContext
*context
, int socket_fd
) {
249 if (socket_fd
< 0 && context
->std_error
== EXEC_OUTPUT_SOCKET
)
250 return EXEC_OUTPUT_INHERIT
;
252 return context
->std_error
;
255 static int setup_input(const ExecContext
*context
, int socket_fd
) {
260 i
= fixup_input(context
, socket_fd
);
264 case EXEC_INPUT_NULL
:
265 return open_null_as(O_RDONLY
, STDIN_FILENO
);
268 case EXEC_INPUT_TTY_FORCE
:
269 case EXEC_INPUT_TTY_FAIL
: {
272 if ((fd
= acquire_terminal(
274 i
== EXEC_INPUT_TTY_FAIL
,
275 i
== EXEC_INPUT_TTY_FORCE
)) < 0)
278 if (fd
!= STDIN_FILENO
) {
279 r
= dup2(fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
280 close_nointr_nofail(fd
);
287 case EXEC_INPUT_SOCKET
:
288 return dup2(socket_fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
291 assert_not_reached("Unknown input type");
295 static int setup_output(const ExecContext
*context
, int socket_fd
, const char *ident
) {
302 i
= fixup_input(context
, socket_fd
);
303 o
= fixup_output(context
, socket_fd
);
305 /* This expects the input is already set up */
309 case EXEC_OUTPUT_INHERIT
:
311 /* If the input is connected to a terminal, inherit that... */
312 if (is_terminal_input(i
) || i
== EXEC_INPUT_SOCKET
)
313 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
317 case EXEC_OUTPUT_NULL
:
318 return open_null_as(O_WRONLY
, STDOUT_FILENO
);
320 case EXEC_OUTPUT_TTY
:
321 if (is_terminal_input(i
))
322 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
324 /* We don't reset the terminal if this is just about output */
325 return open_terminal_as(tty_path(context
), O_WRONLY
, STDOUT_FILENO
);
327 case EXEC_OUTPUT_SYSLOG
:
328 case EXEC_OUTPUT_KERNEL
:
329 return connect_logger_as(context
, o
, ident
, STDOUT_FILENO
);
331 case EXEC_OUTPUT_SOCKET
:
332 assert(socket_fd
>= 0);
333 return dup2(socket_fd
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
336 assert_not_reached("Unknown output type");
340 static int setup_error(const ExecContext
*context
, int socket_fd
, const char *ident
) {
347 i
= fixup_input(context
, socket_fd
);
348 o
= fixup_output(context
, socket_fd
);
349 e
= fixup_error(context
, socket_fd
);
351 /* This expects the input and output are already set up */
353 /* Don't change the stderr file descriptor if we inherit all
354 * the way and are not on a tty */
355 if (e
== EXEC_OUTPUT_INHERIT
&&
356 o
== EXEC_OUTPUT_INHERIT
&&
357 !is_terminal_input(i
))
358 return STDERR_FILENO
;
360 /* Duplicate form stdout if possible */
361 if (e
== o
|| e
== EXEC_OUTPUT_INHERIT
)
362 return dup2(STDOUT_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
366 case EXEC_OUTPUT_NULL
:
367 return open_null_as(O_WRONLY
, STDERR_FILENO
);
369 case EXEC_OUTPUT_TTY
:
370 if (is_terminal_input(i
))
371 return dup2(STDIN_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
373 /* We don't reset the terminal if this is just about output */
374 return open_terminal_as(tty_path(context
), O_WRONLY
, STDERR_FILENO
);
376 case EXEC_OUTPUT_SYSLOG
:
377 case EXEC_OUTPUT_KERNEL
:
378 return connect_logger_as(context
, e
, ident
, STDERR_FILENO
);
380 case EXEC_OUTPUT_SOCKET
:
381 assert(socket_fd
>= 0);
382 return dup2(socket_fd
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
385 assert_not_reached("Unknown error type");
389 static int chown_terminal(int fd
, uid_t uid
) {
394 /* This might fail. What matters are the results. */
396 fchmod(fd
, TTY_MODE
);
398 if (fstat(fd
, &st
) < 0)
401 if (st
.st_uid
!= uid
|| (st
.st_mode
& 0777) != TTY_MODE
)
407 static int setup_confirm_stdio(const ExecContext
*context
,
409 int *_saved_stdout
) {
410 int fd
= -1, saved_stdin
, saved_stdout
= -1, r
;
413 assert(_saved_stdin
);
414 assert(_saved_stdout
);
416 /* This returns positive EXIT_xxx return values instead of
417 * negative errno style values! */
419 if ((saved_stdin
= fcntl(STDIN_FILENO
, F_DUPFD
, 3)) < 0)
422 if ((saved_stdout
= fcntl(STDOUT_FILENO
, F_DUPFD
, 3)) < 0) {
427 if ((fd
= acquire_terminal(
429 context
->std_input
== EXEC_INPUT_TTY_FAIL
,
430 context
->std_input
== EXEC_INPUT_TTY_FORCE
)) < 0) {
435 if (chown_terminal(fd
, getuid()) < 0) {
440 if (dup2(fd
, STDIN_FILENO
) < 0) {
445 if (dup2(fd
, STDOUT_FILENO
) < 0) {
451 close_nointr_nofail(fd
);
453 *_saved_stdin
= saved_stdin
;
454 *_saved_stdout
= saved_stdout
;
459 if (saved_stdout
>= 0)
460 close_nointr_nofail(saved_stdout
);
462 if (saved_stdin
>= 0)
463 close_nointr_nofail(saved_stdin
);
466 close_nointr_nofail(fd
);
471 static int restore_confirm_stdio(const ExecContext
*context
,
479 assert(*saved_stdin
>= 0);
480 assert(saved_stdout
);
481 assert(*saved_stdout
>= 0);
483 /* This returns positive EXIT_xxx return values instead of
484 * negative errno style values! */
486 if (is_terminal_input(context
->std_input
)) {
488 /* The service wants terminal input. */
492 context
->std_output
== EXEC_OUTPUT_INHERIT
||
493 context
->std_output
== EXEC_OUTPUT_TTY
;
496 /* If the service doesn't want a controlling terminal,
497 * then we need to get rid entirely of what we have
500 if (release_terminal() < 0)
503 if (dup2(*saved_stdin
, STDIN_FILENO
) < 0)
506 if (dup2(*saved_stdout
, STDOUT_FILENO
) < 0)
509 *keep_stdout
= *keep_stdin
= false;
515 static int get_group_creds(const char *groupname
, gid_t
*gid
) {
522 /* We enforce some special rules for gid=0: in order to avoid
523 * NSS lookups for root we hardcode its data. */
525 if (streq(groupname
, "root") || streq(groupname
, "0")) {
530 if (safe_atolu(groupname
, &lu
) >= 0) {
532 g
= getgrgid((gid_t
) lu
);
535 g
= getgrnam(groupname
);
539 return errno
!= 0 ? -errno
: -ESRCH
;
545 static int get_user_creds(const char **username
, uid_t
*uid
, gid_t
*gid
, const char **home
) {
555 /* We enforce some special rules for uid=0: in order to avoid
556 * NSS lookups for root we hardcode its data. */
558 if (streq(*username
, "root") || streq(*username
, "0")) {
566 if (safe_atolu(*username
, &lu
) >= 0) {
568 p
= getpwuid((uid_t
) lu
);
570 /* If there are multiple users with the same id, make
571 * sure to leave $USER to the configured value instead
572 * of the first occurence in the database. However if
573 * the uid was configured by a numeric uid, then let's
574 * pick the real username from /etc/passwd. */
576 *username
= p
->pw_name
;
579 p
= getpwnam(*username
);
583 return errno
!= 0 ? -errno
: -ESRCH
;
591 static int enforce_groups(const ExecContext
*context
, const char *username
, gid_t gid
) {
592 bool keep_groups
= false;
597 /* Lookup and ser GID and supplementary group list. Here too
598 * we avoid NSS lookups for gid=0. */
600 if (context
->group
|| username
) {
603 if ((r
= get_group_creds(context
->group
, &gid
)) < 0)
606 /* First step, initialize groups from /etc/groups */
607 if (username
&& gid
!= 0) {
608 if (initgroups(username
, gid
) < 0)
614 /* Second step, set our gids */
615 if (setresgid(gid
, gid
, gid
) < 0)
619 if (context
->supplementary_groups
) {
624 /* Final step, initialize any manually set supplementary groups */
625 ngroups_max
= (int) sysconf(_SC_NGROUPS_MAX
);
627 if (!(gids
= new(gid_t
, ngroups_max
)))
631 if ((k
= getgroups(ngroups_max
, gids
)) < 0) {
638 STRV_FOREACH(i
, context
->supplementary_groups
) {
640 if (k
>= ngroups_max
) {
645 if ((r
= get_group_creds(*i
, gids
+k
)) < 0) {
653 if (setgroups(k
, gids
) < 0) {
664 static int enforce_user(const ExecContext
*context
, uid_t uid
) {
668 /* Sets (but doesn't lookup) the uid and make sure we keep the
669 * capabilities while doing so. */
671 if (context
->capabilities
) {
673 static const cap_value_t bits
[] = {
674 CAP_SETUID
, /* Necessary so that we can run setresuid() below */
675 CAP_SETPCAP
/* Necessary so that we can set PR_SET_SECUREBITS later on */
678 /* First step: If we need to keep capabilities but
679 * drop privileges we need to make sure we keep our
680 * caps, whiel we drop priviliges. */
682 int sb
= context
->secure_bits
|SECURE_KEEP_CAPS
;
684 if (prctl(PR_GET_SECUREBITS
) != sb
)
685 if (prctl(PR_SET_SECUREBITS
, sb
) < 0)
689 /* Second step: set the capabilites. This will reduce
690 * the capabilities to the minimum we need. */
692 if (!(d
= cap_dup(context
->capabilities
)))
695 if (cap_set_flag(d
, CAP_EFFECTIVE
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0 ||
696 cap_set_flag(d
, CAP_PERMITTED
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0) {
702 if (cap_set_proc(d
) < 0) {
711 /* Third step: actually set the uids */
712 if (setresuid(uid
, uid
, uid
) < 0)
715 /* At this point we should have all necessary capabilities but
716 are otherwise a normal user. However, the caps might got
717 corrupted due to the setresuid() so we need clean them up
718 later. This is done outside of this call. */
723 int exec_spawn(ExecCommand
*command
,
725 const ExecContext
*context
,
726 int fds
[], unsigned n_fds
,
728 bool apply_permissions
,
731 CGroupBonding
*cgroup_bondings
,
742 assert(fds
|| n_fds
<= 0);
744 if (context
->std_input
== EXEC_INPUT_SOCKET
||
745 context
->std_output
== EXEC_OUTPUT_SOCKET
||
746 context
->std_error
== EXEC_OUTPUT_SOCKET
) {
759 argv
= command
->argv
;
761 if (!(line
= exec_command_line(argv
)))
764 log_debug("About to execute: %s", line
);
768 if ((r
= cgroup_bonding_realize_list(cgroup_bondings
)))
771 if ((pid
= fork()) < 0)
777 const char *username
= NULL
, *home
= NULL
;
778 uid_t uid
= (uid_t
) -1;
779 gid_t gid
= (gid_t
) -1;
780 char **our_env
= NULL
, **final_env
= NULL
;
782 int saved_stdout
= -1, saved_stdin
= -1;
783 bool keep_stdout
= false, keep_stdin
= false;
787 reset_all_signal_handlers();
789 if (sigemptyset(&ss
) < 0 ||
790 sigprocmask(SIG_SETMASK
, &ss
, NULL
) < 0) {
791 r
= EXIT_SIGNAL_MASK
;
795 if (!context
->no_setsid
)
804 /* Set up terminal for the question */
805 if ((r
= setup_confirm_stdio(context
,
806 &saved_stdin
, &saved_stdout
)))
809 /* Now ask the question. */
810 if (!(line
= exec_command_line(argv
))) {
815 r
= ask(&response
, "yns", "Execute %s? [Yes, No, Skip] ", line
);
818 if (r
< 0 || response
== 'n') {
821 } else if (response
== 's') {
826 /* Release terminal for the question */
827 if ((r
= restore_confirm_stdio(context
,
828 &saved_stdin
, &saved_stdout
,
829 &keep_stdin
, &keep_stdout
)))
834 if (setup_input(context
, socket_fd
) < 0) {
840 if (setup_output(context
, socket_fd
, file_name_from_path(command
->path
)) < 0) {
845 if (setup_error(context
, socket_fd
, file_name_from_path(command
->path
)) < 0) {
851 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, 0)) < 0) {
856 if (context
->oom_adjust_set
) {
859 snprintf(t
, sizeof(t
), "%i", context
->oom_adjust
);
862 if (write_one_line_file("/proc/self/oom_adj", t
) < 0) {
868 if (context
->nice_set
)
869 if (setpriority(PRIO_PROCESS
, 0, context
->nice
) < 0) {
874 if (context
->cpu_sched_set
) {
875 struct sched_param param
;
878 param
.sched_priority
= context
->cpu_sched_priority
;
880 if (sched_setscheduler(0, context
->cpu_sched_policy
|
881 (context
->cpu_sched_reset_on_fork
? SCHED_RESET_ON_FORK
: 0), ¶m
) < 0) {
882 r
= EXIT_SETSCHEDULER
;
887 if (context
->cpu_affinity_set
)
888 if (sched_setaffinity(0, sizeof(context
->cpu_affinity
), &context
->cpu_affinity
) < 0) {
889 r
= EXIT_CPUAFFINITY
;
893 if (context
->ioprio_set
)
894 if (ioprio_set(IOPRIO_WHO_PROCESS
, 0, context
->ioprio
) < 0) {
899 if (context
->timer_slack_ns_set
)
900 if (prctl(PR_SET_TIMERSLACK
, context
->timer_slack_ns_set
) < 0) {
905 if (strv_length(context
->read_write_dirs
) > 0 ||
906 strv_length(context
->read_only_dirs
) > 0 ||
907 strv_length(context
->inaccessible_dirs
) > 0 ||
908 context
->mount_flags
!= MS_SHARED
||
909 context
->private_tmp
)
910 if ((r
= setup_namespace(
911 context
->read_write_dirs
,
912 context
->read_only_dirs
,
913 context
->inaccessible_dirs
,
914 context
->private_tmp
,
915 context
->mount_flags
)) < 0)
919 username
= context
->user
;
920 if (get_user_creds(&username
, &uid
, &gid
, &home
) < 0) {
925 if (is_terminal_input(context
->std_input
))
926 if (chown_terminal(STDIN_FILENO
, uid
) < 0) {
932 if (apply_permissions
)
933 if (enforce_groups(context
, username
, uid
) < 0) {
938 umask(context
->umask
);
941 if (context
->root_directory
)
942 if (chroot(context
->root_directory
) < 0) {
947 if (chdir(context
->working_directory
? context
->working_directory
: "/") < 0) {
955 if (asprintf(&d
, "%s/%s",
956 context
->root_directory
? context
->root_directory
: "",
957 context
->working_directory
? context
->working_directory
: "") < 0) {
971 if (close_all_fds(fds
, n_fds
) < 0 ||
972 shift_fds(fds
, n_fds
) < 0 ||
973 flags_fds(fds
, n_fds
, context
->non_blocking
) < 0) {
978 if (apply_permissions
) {
980 for (i
= 0; i
< RLIMIT_NLIMITS
; i
++) {
981 if (!context
->rlimit
[i
])
984 if (setrlimit(i
, context
->rlimit
[i
]) < 0) {
991 if (enforce_user(context
, uid
) < 0) {
996 /* PR_GET_SECUREBITS is not priviliged, while
997 * PR_SET_SECUREBITS is. So to suppress
998 * potential EPERMs we'll try not to call
999 * PR_SET_SECUREBITS unless necessary. */
1000 if (prctl(PR_GET_SECUREBITS
) != context
->secure_bits
)
1001 if (prctl(PR_SET_SECUREBITS
, context
->secure_bits
) < 0) {
1002 r
= EXIT_SECUREBITS
;
1006 if (context
->capabilities
)
1007 if (cap_set_proc(context
->capabilities
) < 0) {
1008 r
= EXIT_CAPABILITIES
;
1013 if (!(our_env
= new0(char*, 6))) {
1019 if (asprintf(our_env
+ n_env
++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1020 asprintf(our_env
+ n_env
++, "LISTEN_FDS=%u", n_fds
) < 0) {
1026 if (asprintf(our_env
+ n_env
++, "HOME=%s", home
) < 0) {
1032 if (asprintf(our_env
+ n_env
++, "LOGNAME=%s", username
) < 0 ||
1033 asprintf(our_env
+ n_env
++, "USER=%s", username
) < 0) {
1038 if (!(final_env
= strv_env_merge(environment
, our_env
, context
->environment
, NULL
))) {
1043 execve(command
->path
, argv
, final_env
);
1048 strv_free(final_env
);
1050 if (saved_stdin
>= 0)
1051 close_nointr_nofail(saved_stdin
);
1053 if (saved_stdout
>= 0)
1054 close_nointr_nofail(saved_stdout
);
1059 /* We add the new process to the cgroup both in the child (so
1060 * that we can be sure that no user code is ever executed
1061 * outside of the cgroup) and in the parent (so that we can be
1062 * sure that when we kill the cgroup the process will be
1064 if (cgroup_bondings
)
1065 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, pid
)) < 0) {
1070 log_debug("Forked %s as %llu", command
->path
, (unsigned long long) pid
);
1072 command
->exec_status
.pid
= pid
;
1073 command
->exec_status
.start_timestamp
= now(CLOCK_REALTIME
);
1079 void exec_context_init(ExecContext
*c
) {
1083 c
->ioprio
= IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE
, 0);
1084 c
->cpu_sched_policy
= SCHED_OTHER
;
1085 c
->syslog_priority
= LOG_DAEMON
|LOG_INFO
;
1086 c
->mount_flags
= MS_SHARED
;
1089 void exec_context_done(ExecContext
*c
) {
1094 strv_free(c
->environment
);
1095 c
->environment
= NULL
;
1097 for (l
= 0; l
< ELEMENTSOF(c
->rlimit
); l
++) {
1099 c
->rlimit
[l
] = NULL
;
1102 free(c
->working_directory
);
1103 c
->working_directory
= NULL
;
1104 free(c
->root_directory
);
1105 c
->root_directory
= NULL
;
1110 free(c
->syslog_identifier
);
1111 c
->syslog_identifier
= NULL
;
1119 strv_free(c
->supplementary_groups
);
1120 c
->supplementary_groups
= NULL
;
1122 if (c
->capabilities
) {
1123 cap_free(c
->capabilities
);
1124 c
->capabilities
= NULL
;
1127 strv_free(c
->read_only_dirs
);
1128 c
->read_only_dirs
= NULL
;
1130 strv_free(c
->read_write_dirs
);
1131 c
->read_write_dirs
= NULL
;
1133 strv_free(c
->inaccessible_dirs
);
1134 c
->inaccessible_dirs
= NULL
;
1137 void exec_command_done(ExecCommand
*c
) {
1147 void exec_command_done_array(ExecCommand
*c
, unsigned n
) {
1150 for (i
= 0; i
< n
; i
++)
1151 exec_command_done(c
+i
);
1154 void exec_command_free_list(ExecCommand
*c
) {
1158 LIST_REMOVE(ExecCommand
, command
, c
, i
);
1159 exec_command_done(i
);
1164 void exec_command_free_array(ExecCommand
**c
, unsigned n
) {
1167 for (i
= 0; i
< n
; i
++) {
1168 exec_command_free_list(c
[i
]);
1173 static void strv_fprintf(FILE *f
, char **l
) {
1179 fprintf(f
, " %s", *g
);
1182 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
) {
1194 "%sWorkingDirectory: %s\n"
1195 "%sRootDirectory: %s\n"
1196 "%sNonBlocking: %s\n"
1197 "%sPrivateTmp: %s\n",
1199 prefix
, c
->working_directory
? c
->working_directory
: "/",
1200 prefix
, c
->root_directory
? c
->root_directory
: "/",
1201 prefix
, yes_no(c
->non_blocking
),
1202 prefix
, yes_no(c
->private_tmp
));
1205 for (e
= c
->environment
; *e
; e
++)
1206 fprintf(f
, "%sEnvironment: %s\n", prefix
, *e
);
1213 if (c
->oom_adjust_set
)
1215 "%sOOMAdjust: %i\n",
1216 prefix
, c
->oom_adjust
);
1218 for (i
= 0; i
< RLIM_NLIMITS
; i
++)
1220 fprintf(f
, "%s%s: %llu\n", prefix
, rlimit_to_string(i
), (unsigned long long) c
->rlimit
[i
]->rlim_max
);
1224 "%sIOSchedulingClass: %s\n"
1225 "%sIOPriority: %i\n",
1226 prefix
, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c
->ioprio
)),
1227 prefix
, (int) IOPRIO_PRIO_DATA(c
->ioprio
));
1229 if (c
->cpu_sched_set
)
1231 "%sCPUSchedulingPolicy: %s\n"
1232 "%sCPUSchedulingPriority: %i\n"
1233 "%sCPUSchedulingResetOnFork: %s\n",
1234 prefix
, sched_policy_to_string(c
->cpu_sched_policy
),
1235 prefix
, c
->cpu_sched_priority
,
1236 prefix
, yes_no(c
->cpu_sched_reset_on_fork
));
1238 if (c
->cpu_affinity_set
) {
1239 fprintf(f
, "%sCPUAffinity:", prefix
);
1240 for (i
= 0; i
< CPU_SETSIZE
; i
++)
1241 if (CPU_ISSET(i
, &c
->cpu_affinity
))
1242 fprintf(f
, " %i", i
);
1246 if (c
->timer_slack_ns_set
)
1247 fprintf(f
, "%sTimerSlackNS: %lu\n", prefix
, c
->timer_slack_ns
);
1250 "%sStandardInput: %s\n"
1251 "%sStandardOutput: %s\n"
1252 "%sStandardError: %s\n",
1253 prefix
, exec_input_to_string(c
->std_input
),
1254 prefix
, exec_output_to_string(c
->std_output
),
1255 prefix
, exec_output_to_string(c
->std_error
));
1260 prefix
, c
->tty_path
);
1262 if (c
->std_output
== EXEC_OUTPUT_SYSLOG
|| c
->std_output
== EXEC_OUTPUT_KERNEL
||
1263 c
->std_error
== EXEC_OUTPUT_SYSLOG
|| c
->std_error
== EXEC_OUTPUT_KERNEL
)
1265 "%sSyslogFacility: %s\n"
1266 "%sSyslogLevel: %s\n",
1267 prefix
, log_facility_to_string(LOG_FAC(c
->syslog_priority
)),
1268 prefix
, log_level_to_string(LOG_PRI(c
->syslog_priority
)));
1270 if (c
->capabilities
) {
1272 if ((t
= cap_to_text(c
->capabilities
, NULL
))) {
1273 fprintf(f
, "%sCapabilities: %s\n",
1280 fprintf(f
, "%sSecure Bits:%s%s%s%s%s%s\n",
1282 (c
->secure_bits
& SECURE_KEEP_CAPS
) ? " keep-caps" : "",
1283 (c
->secure_bits
& SECURE_KEEP_CAPS_LOCKED
) ? " keep-caps-locked" : "",
1284 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP
) ? " no-setuid-fixup" : "",
1285 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP_LOCKED
) ? " no-setuid-fixup-locked" : "",
1286 (c
->secure_bits
& SECURE_NOROOT
) ? " noroot" : "",
1287 (c
->secure_bits
& SECURE_NOROOT_LOCKED
) ? "noroot-locked" : "");
1289 if (c
->capability_bounding_set_drop
) {
1290 fprintf(f
, "%sCapabilityBoundingSetDrop:", prefix
);
1292 for (i
= 0; i
<= CAP_LAST_CAP
; i
++)
1293 if (c
->capability_bounding_set_drop
& (1 << i
)) {
1296 if ((t
= cap_to_name(i
))) {
1297 fprintf(f
, " %s", t
);
1306 fprintf(f
, "%sUser: %s", prefix
, c
->user
);
1308 fprintf(f
, "%sGroup: %s", prefix
, c
->group
);
1310 if (strv_length(c
->supplementary_groups
) > 0) {
1311 fprintf(f
, "%sSupplementaryGroups:", prefix
);
1312 strv_fprintf(f
, c
->supplementary_groups
);
1316 if (strv_length(c
->read_write_dirs
) > 0) {
1317 fprintf(f
, "%sReadWriteDirs:", prefix
);
1318 strv_fprintf(f
, c
->read_write_dirs
);
1322 if (strv_length(c
->read_only_dirs
) > 0) {
1323 fprintf(f
, "%sReadOnlyDirs:", prefix
);
1324 strv_fprintf(f
, c
->read_only_dirs
);
1328 if (strv_length(c
->inaccessible_dirs
) > 0) {
1329 fprintf(f
, "%sInaccessibleDirs:", prefix
);
1330 strv_fprintf(f
, c
->inaccessible_dirs
);
1335 void exec_status_fill(ExecStatus
*s
, pid_t pid
, int code
, int status
) {
1339 s
->exit_timestamp
= now(CLOCK_REALTIME
);
1345 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
) {
1346 char buf
[FORMAT_TIMESTAMP_MAX
];
1359 prefix
, (unsigned long long) s
->pid
);
1361 if (s
->start_timestamp
> 0)
1363 "%sStart Timestamp: %s\n",
1364 prefix
, format_timestamp(buf
, sizeof(buf
), s
->start_timestamp
));
1366 if (s
->exit_timestamp
> 0)
1368 "%sExit Timestamp: %s\n"
1370 "%sExit Status: %i\n",
1371 prefix
, format_timestamp(buf
, sizeof(buf
), s
->exit_timestamp
),
1372 prefix
, sigchld_code_to_string(s
->code
),
1376 char *exec_command_line(char **argv
) {
1384 STRV_FOREACH(a
, argv
)
1387 if (!(n
= new(char, k
)))
1391 STRV_FOREACH(a
, argv
) {
1398 if (strpbrk(*a
, WHITESPACE
)) {
1409 /* FIXME: this doesn't really handle arguments that have
1410 * spaces and ticks in them */
1415 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1417 const char *prefix2
;
1426 p2
= strappend(prefix
, "\t");
1427 prefix2
= p2
? p2
: prefix
;
1429 cmd
= exec_command_line(c
->argv
);
1432 "%sCommand Line: %s\n",
1433 prefix
, cmd
? cmd
: strerror(ENOMEM
));
1437 exec_status_dump(&c
->exec_status
, f
, prefix2
);
1442 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1448 LIST_FOREACH(command
, c
, c
)
1449 exec_command_dump(c
, f
, prefix
);
1452 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
) {
1459 /* It's kinda important that we keep the order here */
1460 LIST_FIND_TAIL(ExecCommand
, command
, *l
, end
);
1461 LIST_INSERT_AFTER(ExecCommand
, command
, *l
, end
, e
);
1466 int exec_command_set(ExecCommand
*c
, const char *path
, ...) {
1474 l
= strv_new_ap(path
, ap
);
1480 if (!(p
= strdup(path
))) {
1494 const char* exit_status_to_string(ExitStatus status
) {
1496 /* We cast to int here, so that -Wenum doesn't complain that
1497 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1499 switch ((int) status
) {
1507 case EXIT_INVALIDARGUMENT
:
1508 return "INVALIDARGUMENT";
1510 case EXIT_NOTIMPLEMENTED
:
1511 return "NOTIMPLEMENTED";
1513 case EXIT_NOPERMISSION
:
1514 return "NOPERMISSION";
1516 case EXIT_NOTINSTALLED
:
1517 return "NOTINSSTALLED";
1519 case EXIT_NOTCONFIGURED
:
1520 return "NOTCONFIGURED";
1522 case EXIT_NOTRUNNING
:
1523 return "NOTRUNNING";
1543 case EXIT_OOM_ADJUST
:
1544 return "OOM_ADJUST";
1546 case EXIT_SIGNAL_MASK
:
1547 return "SIGNAL_MASK";
1561 case EXIT_TIMERSLACK
:
1562 return "TIMERSLACK";
1564 case EXIT_SECUREBITS
:
1565 return "SECUREBITS";
1567 case EXIT_SETSCHEDULER
:
1568 return "SETSCHEDULER";
1570 case EXIT_CPUAFFINITY
:
1571 return "CPUAFFINITY";
1579 case EXIT_CAPABILITIES
:
1580 return "CAPABILITIES";
1599 static const char* const exec_input_table
[_EXEC_INPUT_MAX
] = {
1600 [EXEC_INPUT_NULL
] = "null",
1601 [EXEC_INPUT_TTY
] = "tty",
1602 [EXEC_INPUT_TTY_FORCE
] = "tty-force",
1603 [EXEC_INPUT_TTY_FAIL
] = "tty-fail",
1604 [EXEC_INPUT_SOCKET
] = "socket"
1607 static const char* const exec_output_table
[_EXEC_OUTPUT_MAX
] = {
1608 [EXEC_OUTPUT_INHERIT
] = "inherit",
1609 [EXEC_OUTPUT_NULL
] = "null",
1610 [EXEC_OUTPUT_TTY
] = "tty",
1611 [EXEC_OUTPUT_SYSLOG
] = "syslog",
1612 [EXEC_OUTPUT_KERNEL
] = "kernel",
1613 [EXEC_OUTPUT_SOCKET
] = "socket"
1616 DEFINE_STRING_TABLE_LOOKUP(exec_output
, ExecOutput
);
1618 DEFINE_STRING_TABLE_LOOKUP(exec_input
, ExecInput
);